The stock coil has good depth although the detech coils I have are definitely deeper I always like tinkering with something. I am getting ready to send a stock one in to get the grey ghost headphones on. I figured I might as well try another coil. I had a stock 800 coil that I really liked it seemed to go deeper then the Excalibur ll coil but the coating on it fstarted to dry rot so i replaced with a detech. Thanks for the advice!